192 DR. G. J. HINDE. 



Lohophytum, Styhpliora, Pocillopoyxi, Fungia, AstrcBa, Goniastrceu, Orhicella, 

 Madrepora, and Porites. 



With some unimportant exceptions the foraminifera and the other organisms in the 

 fine material are the same as those in the boring above. Samples of the broken-up 

 powdered rock appear to be of the same character as that of the solid cores. 



Depth from Surface in feet 230-373. Distance Bored infect 143. 

 Numbers of Cores 187-198. 



The only solid core in this 1 43 feet of the boring is a nodular fragment of white 

 limestone about an inch in diameter. The other material is represented by finely 

 broken-up granular particles of limestone with numerous foraminifera, a small propor- 

 tion of fragmentary casts of corals, amongst which may be recognised pieces of 

 FociUopora, Stylophora, Caloria, Forites, and other perforate corals, together with 

 fragments of other organisms of the same kind as those previously noted. The friable 

 character of this rock is probably in part due to the dissolving away of the corals. 



Depth from Surface in feet 373-637. Distance Bored infect 264. 

 Numbers of Cores 1^^~'^\2. 



The solid cores still form only a small proportion of the materials in this boring ; 

 their total length is 18 feet, or but little more than one-fifteenth of the distance 

 passed through. They consist of greyish, moderately hard, porous and cavernous 

 limestone, containing foraminifera in great numbers, with some casts of corals and 

 fragments of various organisms, cemented together by crystalline calcite. The cores 

 in which foraminifera preponderate are harder and more compact than those partly 

 formed of coral casts. The coral genera comprise Lobophytum, FociUopora, Seriatopora, 

 StylopJiora, Ca;Ioria, Astrcea, Frionastrwa, Madrep)ora, Montipora, and Forites. The 

 common foraminifera belong to Orbitolites. Carpenteria, Calcarina, Folytrema, and 

 Amphistegina. Cycloclypeus makes its first appearance in the Ijoring at the depth of 

 570 feet. Detached alcyonarian spicules, echinid spines, Serpula tubes, polyzoa, and 

 casts of gastropods are generally present. Halimeda, Lithothamnion. Samples of the 

 broken-up, granular, material generally resemble the rock of the solid cores. 



Dep)t'hfrom Surface infect 637-748. Distance Bored iyi feet 111. 

 Numbers of Cores 313-366, 1a-31a. 



Between the depths of 637 feet and 748 feet the rock markedly differs from the 

 hard greyish limestone of the cores immediately above. It becomes milky-white and 

 chalky-looking, soft and very porous, so that it can be crushed between the fingers. 



